#include <stdio.h>

int main() {
  int max(int x, int y);
  int a, b, c;
  scanf("%d,%d", &a, &b);
  c = max(a, b);
  printf("max=%d\n", c);
  return 0;
}

int max(int x, int y) {
  int z;
  if (x > y)
    z = x;
  else
    z = y;
  return (z);
}